#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
	pid_t pid;
	printf("Before: pid is %d\n", getpid());
	pid = fork();
	if (pid == -1)
	{
		perror("fork()");
		exit(1);	
	}
	printf("After: pid is %d, fork return %d\n", getpid(), pid);
	sleep(1);
	return 0;
}
